<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Paginator
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Elastic.php 18951 2009-11-12 16:26:19Z alexander $
 */

/**
 * @see Zend_Paginator_ScrollingStyle_Sliding
 */
require_once 'Zend/Paginator/ScrollingStyle/Sliding.php';

/**
 * A Google-like scrolling style.  Incrementally expands the range to about
 * twice the given page range, then behaves like a slider.  See the example
 * link.
 *
 * @link       http://www.google.com/search?q=Zend+Framework
 * @category   Zend
 * @package    Zend_Paginator
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Paginator_ScrollingStyle_Elastic extends Zend_Paginator_ScrollingStyle_Sliding
{
	/**
	 * Returns an array of "local" pages given a page number and range.
	 *
	 * @param  Zend_Paginator $paginator
	 * @param  integer $pageRange Unused
	 * @return array
	 */
	public function getPages(Zend_Paginator $paginator, $pageRange = null)
	{
		$pageRange  = $paginator->getPageRange();
		$pageNumber = $paginator->getCurrentPageNumber();

		$originalPageRange = $pageRange;
		$pageRange         = $pageRange * 2 - 1;

		if ($originalPageRange + $pageNumber - 1 < $pageRange) {
			$pageRange = $originalPageRange + $pageNumber - 1;
		} else if ($originalPageRange + $pageNumber - 1 > count($paginator)) {
			$pageRange = $originalPageRange + count($paginator) - $pageNumber;
		}

		return parent::getPages($paginator, $pageRange);
	}
}